2026-04-17T02:48:35Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1824262026-04-09T18:13:12Zcom_2072_1057col_2072_478813col_2072_478917

00925njm 22002777a 4500 dc Tapia, María A. author Gusmão, Rui Jorge Coelho author Pérez Ràfols, Clara author Subirats i Vila, Xavier author Serrano i Plana, Núria author Sofer, Zdenek author Díaz Cruz, José Manuel author 2022-01-17T15:05:04Z 2022-01-17T15:05:04Z 2021-11-05 2022-01-17T15:05:04Z The exceptional properties of 2D layered black phosphorus (BP) make it a promising candidate for electrochemical sensing applications and, even though BP is considered unstable and tends to degrade by the presence of oxygen and moisture, its oxidation can be beneficial in some situations. In this work, we present an unequivocal demonstration that the exposition of BP-based working electrodes to normal ambient conditions can indeed be advantageous, leading to an enhancement of voltammetric sensing applications. This point was proved using a BP modified screen-printed carbon electrode (BP-SPCE) for the voltammetric determination of dopamine (DA) as a model target analyte. Oxidized BP-SPCE (up to 35% of PxOy at the surface) presented an enhanced analytical performance with a 5-fold and 2-fold increase in sensitivity, as compared to bare-SPCE and non-oxidized BP-SPCE stored in anhydrous atmosphere, respectively. Good detection limit, repeatability, reproducibility, stability, selectivity, and accuracy were also achieved. Overall, the results presented herein display the prominent possibilities of preparing and working with BP based-sensors in normal ambient settings and showcase their implementation under physiological conditions. Dopamina Fòsfor Voltametria Dopamine Phosphorus Voltammetry Enhanced voltammetric performance of sensors based on oxidized 2D layered black phosphorus